Paper Info
Title
Certificateless KEM and hybrid signcryption schemes revisited
Abstract
Often authentication and confidentiality are required as simultaneous key requirements in many cryptographic applications. The cryptographic primitive called signcryption effectively implements the same and while most of the public key based systems are appropriate for small messages, hybrid encryption (KEM-DEM) provides an efficient and practical way to securely communicate very large messages. The concept of certificateless hybrid signcryption has evolved by combining the ideas of signcryption based on tag-KEM and certificateless cryptography. Recently, Lippold et al. [14] proposed a certificateless KEM in the standard model and the first certificateless hybrid signcryption scheme was proposed by Fagen Li et al. [16]. In this paper, we show that [14] is not Type-I CCA secure and [16] is existentially forgeable. We also propose an improved certificateless hybrid signcryption scheme and formally prove the security of the improved scheme against both adaptive chosen ciphertext attack and existential forgery in the appropriate security model for certificateless hybrid signcryption.
Year
DOI
Venue
2010
10.1007/978-3-642-12827-1_22
IACR Cryptology ePrint Archive
Keywords
DocType
Volume
certificateless hybrid signcryption,cryptanalysis,hybrid signcryption scheme,appropriate security model,improved scheme,provable security,hybrid encryption,certificateless cryptography,signcryption,certificateless kem,tag-kem,improved certificateless,bilinear pairing,hybrid signcryption,cryptographic application,certificateless hybrid signcryption scheme,ran- dom oracle model.,chosen ciphertext attack,security model,secure communication,standard model,random oracle model,public key
Conference
2009
ISSN
ISBN
Citations 
0302-9743
3-642-12826-2
6
PageRank 
References 
Authors
0.51
31
3
Name
Order
Citations
PageRank
Sharmila Deva Selvi113823.41
Sree Vivek214020.72
C. Pandu Rangan31434149.57